Steam-boiler



3 Sheets-Sheet 1. G. H. ASIRE. STEAM BOILER.

(No Model.)

No. 410,394. Patented Sept. 3, 1889.

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(No Model.) 3 Sheets--Sheet 2. G. H. ASIRE.

STEAM BOILER.

No. 410,394. Patented Sept. 3, 1889.

VVITNESSES: j! INVEN e][/Z -z'z-@ N, vnens Fholvlilhcgnpmr, Wnhington.o. c.

(No Model.) 3 Sheets-Sheet 3. G.- H. ASIRE. STEAM BOILER.

No. 410,394. Patented Sept. 3,1889.

'IIIIIW II III I I II I WITNESSES: INVENTOR:

JIM/M I y 147 UNITED STATES PATENT ()FFIc-E.

GEORGE II. ASIRE, OF SOUTH BEND, INDIANA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent N 0. 410,394, datedSeptember 3, 1889. Application filed April 16, 1888- Serial No. 270,881.(No model.)

To all whom it may concern:

Be it known that I, GEORGE H. ASIRE, a

- citizen of the United States, residing at South Bend, in the county ofSt. Joseph and State of Indiana, have invented a certain new and usefulImprovement in Steam-Boilers, which is fully set forth in the followingspecification, reference being had to the accompanying drawings, inwhich Figure 1 is a central longitudinal sectional view of asteam-boiler embodying my inven tion; Fig. 2, a front elevation of thesame, a portion being broken away to show the internal construction;Fig. 3, a rear elevation, a portion of the rear wall being broken awayto show the internal construction; and Fig. 4, a side elevation.

Like letters refer to like parts in all the figures of the drawings.

My invention relates to steam-boilers, and more particularly to thatclass known as water-tube boilers, and has for its object to provide aconstruction whereby rapid evaporation of the water can be obtained byreason of a free circulation of the water and a large heatingsurfaeethoroughly exposed to the action of the burning gases.

To these ends my invention consists in certain novel features, which -Iwill now proceed to describe, and will then particularly point out inthe claims.

In the drawings, A represents the inclosing brick-work of the furnace,provided with the usual front A and grate-bars a, the rear ends of whichrest upon a transverse fire-wall a.

B represents the steam and water drum, which is preferably cylindricalin shape and set transversely in the top of the brick-work A above thegrate-bars, the lowerhalf of said steam-drum being within thecombustionchamber formed within the brick-work A. A steam-supply pipe 12leads from the top of the steam-drum B in the usual manner. In front ofthe said steam-dru m there is arranged within the combustion-chamber atransverse water-chamber B, connected to the steamdrum B by a centralpipe I). This waterchamber is preferably angular in form, its front andbottom walls being inclined to correspond to the inclination of thewater-tubes, and it being provided near its rear lower edge with adownwardly-extending water-leg B At the rear of the steam-drum B thereis arranged within the combustion chamber a transverse water-chamber Bconnected to the steam-drum B by means of a central pipe W. Thiswater-chamber is also preferably angular in shape and of somewhatsmaller dimensions than the water-chamber B, its rear and bottom wallsbeing inclined to correspond to the inclination or slope of thewater-tubes. At the rear of the combustionchamber there is arranged nearthe bottom thereof and supported upon a bridge-wall a a lowerwater-chamber B extending transversely of the combustion-chamber andpreferably rectangular in shape, itbeing inclined to correspond to theinclination of the Watertubes and being provided with anupwardlyprojecting Water-leg Z) at its front. Above this water-chamberthere is arranged another water-chamber B also preferably rectangular inshape and similarly inclined, it being connected to the water-chamber Bby means of circulating-tubes Z1 at each side, said tubes passingthrough the brick-Work A and being arranged out-side of said brickwork,except where they pass through the same and enter the combustion-chamberto connect with the water-chambers. The tubes are arranged in twogroupsa lower or main group C and an upper or auxiliary group Bthe twogroups being separated by means of a baffleplate E, which extends fromthe water-chamber B" to the water-chamber B as clearly shown in Fig. 1of the drawings. It will be observed that the baffle-plate E thusextends the entire length of the upper group of tubes, the water-chamberB forming a continuation at the front of said bathe-plate, and thewaterchaniber B forming a continuation at the rear; and since the spaceabove the Water-chamber B is closed in the manner hereinafter describedthe direction of the gases is completely reversed and all portions ofboth groups of tubes thoroughly heated, as hereinafter set forth. Allthe water-tubes are illclined downward from front to rear, those of thelower group serving to connect the Waterchamber B with the waterchamberI3 and those of the upper group serving to connect the Waterchamber Bwith the water-chamber B The two upper rows of tubes 0 of the lowergroup C are connected at their front I ends directly to the water-leg Bof the waterchamber B by means of suitable screw or other joints, theirrear ends being connected to the water-chamber B by means of short tubes0', arranged at right angles to the long tubes 0 and entering the top ofsaid waterchamber, to which they are connected in any suitable manner.The lower rows of tubes 0 of the lower group C are connected at theirrear ends directly to the water-chamber B or its water-leg 12 whiletheir front ends are connected to the water-chamber B by means of shorttubes 0 arranged at right angles to the long tubes 0 and entering thebottom of the water-chamber B, as shown in Fig. 1. The tubes d of theupper group D are connected at their front ends directly to. thewaterchamb er B their rear ends being connected to the water-chamber Bby means of short tubes (1, arranged at right angles to the long tubesD, and entering the said water-chamber at the top.

It will be observed that each water-tube consists of two portions-a longtube and a short tube-arranged at right angles thereto. The connectionbetween these two portions is effected by means of a four-way couplingor union F, having two passages arranged at right angles and passingentirely through the same, two of the orifices thus formed receiving theends of the long and short pipes, respectively,

while the two orifices opposite the ends are closed by means ofscrew-plugs f. It will also be observed that the tubes of each group areso arranged that the tubes composing each horizontal series, instead ofbeing imm ediately below the tubes of the series above them, arearranged beneath the spaces separating the tubes of said upper series.In other words, the arrangement of the tubes is alternate instead ofcoincident. This arrangement enables me to carry each individual tubeclear through to the front or rear, as the case may be, withoutdisplacing or deflecting the short tubes, which serve to connect thelong tubes to the water-chambers. Each individual tube is thus readilyaccessible for cleaning, either at one end of the apparatus or theother, both so far as its long and short portions are concerned, and allthe tubes are substantially of the same length and capacity.

On the top of the fire-wall a thereis arranged, at right angles to thetubes of the lower group, a transverse baffle-plate G, extending upwardto the top of the said tubes, which latter pass' through the said plate.In the rear of this baffle-plate and about half-way between the same andthe rear end of the tubes there is arranged another baffle-plate G,extending transversely across the combustion-chamber and downward fromthe baffle-plate E to the lower portion of the said tubes.

The main circulating-tubes H are connected to the water-chamber B at theends thereof, and, passing outward through the brick-work A, extendupward and forward outside of the same to a point opposite the ends ofthe steamdrum B, at which point they pass inward through the brick-workand open into the said drum, passing through the ends thereof at a pointnear the bottom of the drum, as indicated in Fig. 1 of the drawings.These pipes are two in number, being arranged one on each side of theapparatus and outside of the combustion-chamber, except at those pointswhere they enter the same to connect with the steamdrumandwater-chamber.

I represents the smoke-flue, which leads from the combustion-chamber ata point immediately above the front ends of the upper group ofwater-tubes, a small baffle-plate i being arranged transversely of thecombustion-chamber between the top thereof and the top of thewater-chamber B immediately in front of the smoke-flue.

The apparatus thus constructed operates in the following manner: It willbe observed that the burning gases from the fuel placed upon thegrate-bars a pass first directly upward and heat not only the upper endof the lower group of pipes, but also the steamdrum and thewater-chambers B and B at the front of the combustion-chamber. Thesegases then pass over the baffle-plate G and heat the middle portion ofthe lower group of tubes, then under the baffle-plate G, after whichthey heat the lower portion of the lower group of tubes, and, passingaround the end of the bathe-plate E, heat the upper group, and passthence into the smoke-flue, following throughout the course indicated bythe arrows in Fig. 1. By dividing the watertubes into two groupsseparated by the batfle-plate E, I am enabled to expose the said tubesmuch more thoroughly to the action of the burning gases and obtain agreater heating-surface and a more thorough and quick evaporation of thewater. This is also facilitated by the use of the circulating-tubes connecting the several water-chambers and the steam-drum, which, bypromoting a free circulation of the water, materially increase theefficiency of the apparatus. The construction of each tube in twosections connected at an angle to each other permits free expansion andcontraction of the said tubes, and the employment of the four-way jointor union at the point of connection of the sections permits each sectionof each tube to be readily accessible for cleaning or inspection bysimply removing the screw plug opposite the end of the same.

It is obvious that various modifications in the details of constructionmay be made without departing from the principle of my invention, and Itherefore do not wish to be understood as limiting myself strictly tothe precise details hereinbcfore described, and shown in the drawings. 1

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is I IIO 1. The combination, with thesteam-drum B, of the transverse water-chambers B and B connectedthereto, the water-chambers B and 13, arranged at the rear of thecombustion-chamber, the inclined groups C and D of water-tubes,connecting, respectively, the chambers B B and B B and thecirculating-pipes b and H, connecting the rear water-ehambers with eachother and with the steam-drum, substantially as and for the purposesspecified.

2. The combination, with the water-chamber B, having water-leg B and thewaterchamber B having water-leg 12 of the watertubes 0, connected to thewater-leg B the short tubes 0, arranged at right angles thereto andconnected to the water-chamber 13*, the Water-tube 0 connected to thechamber B and its water-leg b and the short tubes 0 arranged at rightangles thereto and 0011- nected to the water-chambei-B, substantially asand for the purposes specified.

3. The combination, with the upper and lower water-chambers, of thewater-tubes connecting the two, and each consisting of a long inclinedtube and a short tube arranged at right angles thereto, the horizontalseries of said tubes being alternately arranged, as described, so thateach tube extends clear through to the front or rear, substantially asand for the purposes specified.

4. The combination, with the steam-drum, of the lower group O ofwater-tubes, above the front portion of which the steam-drum isarranged, the upper or auxiliary group extending rearward from thesteamdrum, a bathe-plate arranged between the two groups and extendingfrom the front water-chamber to the rear Water-chamber of the uppergroup, and a second baffle-plate closing the space between the frontWater-chamber of the upper group and the casing, substantially as andfor the purposes specified.

5. The combination, with the Water-tubes, each composed of two sectionsarranged at right angles to each other, said tubes being arranged inalternate horizontal series, so that each tube extends clear through tothe front or rear, of the four-way unions or couplings connecting thetwo sections of each tube and provided with screw-plugs to close theapertures opposite the ends thereof, substantially as and for thepurposes specified.

GEORGE II. ASIRE.

\Vitnesses: I

JAMES BUTLER,

1E0. M. WITMER.

